Nor-Cal Intellisys Adaptive Pressure Controllers - Manual (Page 22)

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I
ntellIsys
A
dAptIve
p
ressure
C
ontrollers
APC-OP-LIT 1/12
DeviceNet is a network communication protocol that provides a cost-effective
solution to low-level device networking for semiconductor equipment tools
with power and signal in the same cable. Process data and other information
such as configuration parameters can be communicated for up to 64 nodes
per network at data rate up to 500K baud. The DeviceNet pressure control-
ler conforms to the ODVA Process Control Valve (PCV) device profile. This
device profile is available in the Volume II, Release 2.0, Errata 5 of the official
DeviceNet specification. Accordingly, the purpose of this manual is to provide
an overview on the basic use of the DeviceNet communication interface as it
relates to the IQ pressure controller, as well as report the different options
supported by the controller software communication interface.
DeviceNet Connector:
The communication port is a sealed micro-
style M12 male connector that conforms
to the DeviceNet specification. The connec-
tor pin out is shown in Figure 8.1.
The controller unit requires a 24 VDC +/-
10% power source, which is typically pro-
vided through the auxiliary port - however, the controller can be configured
to accept power via the DeviceNet connector. Please consult the factory for
information on this option.
baud Rate Selection:
The baud rate selector as shown in Figure 8.2 is a
4 position rotary switch used to select the desired
baud rate of the controller, respectively 125Kb,
250Kb, 500Kb and software programmable.
The software programmable baud rate is kept
in non-volatile memory and settable through
the DeviceNet object.
mACID Selector:
Two rotary switches are used to set the MACID of the device on the network
between 0 and 63 and software programmable. Note that MACID 0 is com-
monly reserved for the network master and should not be used by any slave
device, the factory default setting is
MACID 63. Additionally, positions 64 to 99
correspond to the software programmable
setting. The MACID programmed in
non-volatile memory will then be used.
The software programmable MACID is
configurable via DeviceNet. However, note
that a change to the baud rate and MACID
switches only becomes effective
once the device is reset.
8.0 - DeviceNet Interface
module Status: A bicolor (red/green) Module status LED indicates the status
of the communication module according to the logic in Table 8.1.
TAbLE 8.1 - DEVICENET mODULE LED STATUS
leD StAtuS
Green Module OK
Red Fault condition
OFF No DC power
Network Status:
A bicolor (red/green) Network status LED indicates the status of the communi-
cation link according to the logic in Table 8.2.
TAbLE 8.2 - DEVICENET NETWORk LED STATUS
leD StAtuS
Flashing Green Network OK device offline
Green Network OK device online
Flashing Red Recoverable fault
Red Unrecoverable fault
OFF No network detected
No network detected:
This is an indication from the software that multiple attempts to publish a
message (typically a duplicate MACID check message) have been made but no
acknowledgement of that message has been received. It is the normal mode
of operation if the network connection is not used.
Network Ok device offline:
If the device successfully detects a live bus it will transition to flashing green,
that is the standby mode, the device is ready for the master node to establish
a connection.
Network Ok device online:
When the device has successfully been attributed a connection by the master
the network LED will transition to solid green
Recoverable fault:
If the master unexpectedly drops the connection (lets the slave time out) the
LED will transition to flashing red, signaling the occurrence of a time out fault.
If the network master re-establishes the connection the device will then
recover to normal operating mode.
Unrecoverable fault:
A red Network LED signals the occurrence of a major network fault such as
two devices having the same MACID, an incompatible baud rate setting or a
short in the communication signal lines.
8.1. Overview and setup
250Kb
P
RATE
500Kb 125Kb
1 Drain
4 CAN_H 3 V-
2 V+
5 CAN_L
FIGURE 8.1 - IqD DEVICENET
CONNECTOR PIN ASSIGNmENT
FIGURE 8.2 -
DEVICENET bAUD RATE
SELECTION SWITCh
MSD LSD
4 6
2 8 2
4 6
P
ADDRESS
0 0
FIGURE 8.3 - DEVICENET
ADDRESS SWITChES